<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 每一行分为24格 -->
            <el-row
              :class="['bdbottom', index1 == 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, index1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag>{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[index2 == 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, index2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag type="success">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row)"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
            @click="deleteRoleById(scope.row.roleId)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <!-- ref不需要动态绑定 -->
      <!-- 动态绑定需要用到data中的属性 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      >
        <!-- id会默认绑定:props对应值的节点属性id的值 -->
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRoleVisible"
      width="50%"
      @close="addRoleClosed"
    >
      <el-form
        ref="addRoleRef"
        :model="addRoleForm"
        :rules="addRoleRules"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <div slot="footer">
        <el-button @click="addRoleVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoleConfirm">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 修改角色对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editRoleVisible"
      width="50%"
      @close="editRoleClosed"
    >
      <el-form
        ref="editRoleRef"
        :model="editRoleForm"
        :rules="editRoleRules"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <div slot="footer">
        <el-button @click="editRoleVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleConfirm">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolesList: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //权限数据
      rightsList: [],
      //树形控件的树形绑定对象
      treeProps: {
        label: 'authName', //使用哪个属性显示文本
        children: 'children', //父子节点通过哪个属性实现嵌套
      },
      //默认选中的节点Id值数组
      defKeys: [],
      //即将分配权限的角色id
      roleId: '',
      addRoleVisible: false,
      addRoleForm: {
        roleName: '',
        roleDesc: '',
      },
      addRoleRules: {
        roleName: [
          { required: true, message: '角色名称不能为空', trigger: 'blur' },
        ],
      },
      editRoleVisible: false,
      editRoleForm: {},
      editRoleRules: {
        roleName: [
          { required: true, message: '角色名称不能为空', trigger: 'blur' },
        ],
      },
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolesList = res.data
    },
    //根据Id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除!')
      }
      //调用对应接口实现删除功能
      const { data: res } = await this.$http.delete(
        `roles/${role.roleId}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除操作失败!')
      }
      //会重新渲染页面
      //this.getRolesList()
      //role是传入的角色对象,children是权限列表
      role.children = res.data //接口会返回权限的最新数据,覆盖数据即可
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.roleId
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      //把获取到的数据保存
      this.rightsList = res.data

      //递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    //通过递归的形式,获取角色下所有的三级权限的id,并保存到defKeys数组中
    getLeafKeys(node, arr) {
      if (!node.children) {
        arr.push(node.id)
        return
      }

      node.children.forEach((item) => {
        this.getLeafKeys(item, arr)
      })
    },
    //监听分配权限对话框的关闭事件(不关闭会产生bug)
    setRightDialogClosed() {
      this.defKeys = []
    },
    //点击为角色分配权限
    async allotRights() {
      //通过$refs引用树形控件,调用相关方法,使用...展开数组,
      //注意调用的内部方法,keys结尾的是获取节点对应key值的数组,Node结尾的是获取节点的数组
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { psIds: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }

      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    addRoleClosed() {
      this.addRoleForm = {}
      this.$refs.addRoleRef.resetFields()
    },
    addRoleConfirm() {
      this.$refs.addRoleRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写必填的选项')
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败')
        }
        this.getRolesList()
        this.$message.success('添加角色成功')
        this.addRoleVisible = false
      })
    },
    showEditDialog(row) {
      this.editRoleForm = {
        roleId: row.roleId,
        roleName: row.roleName,
        roleDesc: row.roleDesc,
      }
      this.editRoleVisible = true
    },
    editRoleClosed() {
      this.editRoleForm = {}
      this.$refs.editRoleRef.resetFields()
    },
    editRoleConfirm() {
      this.$refs.editRoleRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请输入必填的选项')
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleForm.roleId,
          this.editRoleForm
        )
        if (res.meta.status !== 200) return this.$message.error('修改角色失败')
        this.getRolesList()
        this.$message.success('修改角色成功')
        this.editRoleVisible = false
      })
    },
    async deleteRoleById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if(confirmResult !== 'confirm'){
        return this.$message.info('已取消删除')
      }
      const {data:res}=await this.$http.delete('roles/'+id)
      if(res.meta.status!==200){
        return this.$message.error('删除角色失败')
      }
      this.getRolesList()
      this.$message.success('删除角色成功')
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
